Compensation device for vehicle suspension.



R. GUILLERY. COMPENSATION DEVICE FOR VEHICLE SUSPENSION.

APPLICATION FILED MAR. 25, 1918.

Patented Oct. 14,1913.

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R. GUILLBRY;

COMPENSATION DEVIGE FOR VEHICLE SUSPENSION.

APPLICATION PILEDYMAR. 25, 1913.

1 0mm 5 Patented Oct. 14, 1913.

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UNTTEE STATES PATENT @FTTQE' RENE GUILLERY, 0F AUBERVILLIERS, FRANCE,ASSIGNOR TO SOGIETE IDES ETABLISS'E- MEN'IS MALICET ET BLIN, 0FAUBERVILLIERS, FRANCE.

COMPENSATION DEVICE FOR VEHICLE SUSPENSION.

To all whom it may concern:

Be it known that I, RENE GUILLERY, a

citizen of the French Republic, and residing at 103 Avenue de LaRepublique, Aubervilliers, France, have invented a certain new anduseful Compensation Device for Vehicle Suspension, of which thefollowing is a specification.

It is known that there have already been produced compensation devicesfor suspension of vehicles which have more particularly for their objectto distribute over the whole of the springs of the vehicle, theadditional load which is imposed on one of them when one of the wheelsof the corresponding axle is exposed to a sudden movement due forinstance to meeting an inequality in the road.

This invention has for its object a special compensation device of thiskind more particularly characterized by the distribution of themovements, and consequently of abnormal positive or negative stresses onany one of the suspension springs, being efiected by a double funicularsystem, symmetrical relatively to the longitudinal axis of'the oar frameand cooperating with pivoted levers and guide-rollers insuring theworking of cables which connect together respectively the correspondingends of all other springs.

In the accompanying drawing given by way of example, Figure 1 shows inelevation a car frame provided with funicular compensation deviceforming the subject of the present invention, Fig. 2 being acorresponding plan. Figs. 3 and 4 show diagrammatically the conditionsof stability of this system of suspension;

According to this invention, each of the four springs is connecteddirectly to the frame with one of its ends a a a a It is secured to thewheel train at its center I) b b b and pivoted at its other end 0 c c oto a two-armed lever (Z (Z d 0 the angle of which is suitably calculatedfor avoiding unstable equilibrium of the system. The center ofarticulation of the lever is secured to the frame of the vehicle.

At each side of the frame is secured a biacket as shown for example at ecarrying t-Wo grooved pulleys f and f f mounted on balls, the spindlesof the said pulleys being arranged at a suitable angle.

A flexible cable connects together the ends Specification of LettersPatent.

- Patented @ct. ill, ildt Application filed March 25, 1913. Serial No.756,757.

g and g of the double levers (2 d passing on the one hand over thegrooved pulleys f and f and on the other hand over a pulley h which isnearer to the center of the vehicle. Another cable going from g to 9.,passes over the pulleys f and f and over a pulley h.

The two grooved pulleys h and h are connected together by a doubleshackle z supporting their pins, the length of which can be adjusted atwill by a device acting as a turn-buckle. F or a given position thetensions in the cables are in equilibrium. This tension is practicallythe same for the two cables, this being due to the method of theirconnection.

If one of the wheels meets an obstacle or a hollow in the road, it risesor sinks to the height of the said obstacle or of the hollow, bringingabout by the action of its spring on the end of the correspondingdouble-armed lever, a positive or negative variation of stress which istransmitted by the cable to the three other levers which at the sametime cause the three other springs to act. This results in aconsiderable reduction of the individual stresses on the springs, on theone hand, and in a reduction in disturbances which the obstacle wouldhave trans mitted to the frame through a single spring.

It is necessary to bear in mind that the angle of the vertical arms ofthe levers with the mean direction of the cables, plays an importantpart in the working of the suspension. l'n fact, if Fig. 3 isconsidered-in which the vertical arms make with the cables an angleequal to, or very near, 90, it will be seen that when the front wheel,for instance, meets an obstacle, the spring 7) moves and arrives at bThe lever pivoted at d assumes the position shown dotted. The leverpivoted at (P, which is connected to the preceding one by the cable,also takes up the position shown dotted. In order that the suspensionshould produce a good result it is obviously necessary that, as soon asthe obstacle is passed, the system should resume its relative initialpositions. The return forces of the two pivoted systems, vary thereforein the same direction, and as will be readily seen from the drawing, topractically the same amounts. If the system is in equilibrium in itsinitial positions (which is a normal case), it follows that it willstill be in equilibrium in its new positions which it has reached forthe compensation. The system is therefore not submitted to any efforttending to brinit back to itsoriginal positions. The equili )rium issimilar to the indifferent equilibrium of a balance.

The diagram in Fig. 4 shows a form in which the angles of the leverswith the cables are difi'erent, being greater than a right angle. I

If the equilibrium is obtained in the position of the levers shown infull lines, it will be seen that, when the shock has brought them intothe position shown in dotted lines, the moment of the return forces,will have increased for one of the systems, and decreased for the other.The equilibrium will be therefore broken, which will produce an efforttending .to bring the various parts of the suspension to their initialrelative positions.

It is necessary that the suspension should comply with the abovementioned conditions for insuring good working. The grooved pulleys canbe protected by a sheath forming a stayfor the frame. The cable could bereplaced in straight parts by rods, and in the portions passing overpulleys, by chains. Brake devices or pneumatic or spring-controlledshock absorbers for reducing oscillations can be employed. It must alsobe pointed out that in case of the cables breaking, the suspension wouldwork like an ordinar spring suspension.

hat I claim as my invention and desire tosecure by Letters Patent is 1.In a funicular compensating device for the suspension systems ofvehicles, the combination with hangers on the frame, of double leverspivoted to the said hangers for supporting with one of their arms and,by means of shackles, the corresponding ends of the springs, cablesconnecting respectively the other arms of the double levers arranged onone and the same side of the vehicle, and means for connecting togetherthe said cables.

2. In a funicular compensating device for the suspension systems ofvehicles, the combination with hangers on the frame, of double leverspivoted to the said hangers for supporting by means of shackles thecorresponding ends of the springs, cables arranged longitudinally of theframe and having their ends secured to the arms of the double leversarranged on one and the same side of the vehicle, and means forconnecting together the longitudinal cables transversely of the frame.

3. In a funicular compensating device for the suspension systems ofvehicles, the combination with hangers on the frame, of double leverspivoted to the said hangers for supporting by means of shackles thecorresponding ends of the springs, cables arconnecting together the saidtension pulleys.

4. In a funicular compensating device for the suspension systems ofvehicles, the combination with hangers on the frame, of double leverspivoted to the said hangers for supporting by means of shackles thecorresponding ends of the springs, cables arranged longitudinallyrelatively to the frame and having their ends secured to the arms ofdouble levers arranged on one and the same side of the vehicle, guidepulleys for each of the cables, adapted to form loops arrangedtransversely of the frame, a bracket for each of the said guide pulleys,tension pulleys arranged at either side of the longitudinal plane ofsymmetry of the frame for maintaining the loops of the cables properlystretched, shackles for the said pulleys and a turn-buckle between thesaid shackles.

5. In a funicular compensating device for the suspension systems ofvehicles, the combination with hangers on the frame, of double leverspivoted to the said hangers for supporting b means of shackles thecorresponding en s of the springs, cables arranged at either side of theframe and having their ends secured to the arms of double leversarranged at the same side of the vehicle, guide pulleys for each of thecables adapted to form loops arranged transversely of the frame,brackets secured to the frame, pins pivoted to the said brackets adaptedto support guide pulleys having ranged in the direction of thecorresponding section of the cable, fixed pulleys arranged at eitherside of the longitudinal plane of symmetry of the frame, for the 'purose of maintainin stretched, s ackles for the said pulleys, and aturn-buckle between the said shackles.

6. .In a funicular compensating device for the suspension systems ofvehicles, the com bination with hangers on the frame, of double leverspivoted to the said hangers for supporting by means of shackles thecorresponding ends of the springs, cables arranged at either side of theframe and having their ends secured to the arms of said double levers,and making angles therewith greater than 90, guide pulleys for each ofthe said cables adapted to form loops arranged at a right angle to thelongitudinal axis of the frame, brackets secured to the frame, pinspivoted to the said brackets adapted to support guide pulleys, havinggrooves arranged in the direction of the corgrooves arthe loops of thecables suitably responding section of the cable, tension pulleysarranged at either side of the longitufinal plane of symmetry of theframe for maintaining the loops of the cables prop- 5 erly stretched,shackles for the ssid pulleys and a turn-buckle between the saidshackles. In testimony whereof I have signed my RENE GUILLERY.

Witnesses:

' VICTOR DUPONT,

GEORGES BONNEUIL.

